How to grow common periwinkle

When to plant common periwinkle

Common periwinkle is a trailing broadleaf-evergreen groundcover with small blue-lavender flowers in spring and early summer (NC State), intermittently through the year. Plant in spring or fall; it roots at the nodes to form a dense mat and spreads rapidly, and because it is classified invasive by the NC Invasive Plant Council, native alternatives are preferred where its spread into lawns and natural areas is a concern.

Common Periwinkle is timed by season rather than your frost dates, so the planting calendar does not generate ZIP-specific dates for it. Check the cited sources below to fine-tune for your area.